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Wind forced low frequency variability of the East Australia Current

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Hill, KL and Rintoul, SR and Coleman, R and Ridgway, KR (2008) Wind forced low frequency variability of the East Australia Current. Geophysical Research Letters, 35 (L08602). pp. 1-5. ISSN 0094-8276

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Abstract

A 62 year record of temperature and salinity from a coastal station off southeast Australia shows a strong positive trend and quasi-decadal variability but the cause of the observed changes has not been explained. The temperature and salinity variations are highly correlated. The increase in temperature and salinity with time agrees closely with the mean meridional gradient of water properties along the continental slope, suggesting that changes in strength of the poleward extension of the East Australian Current are responsible for the observed variability. Interannual temperature and salinity changes are correlated (r = 0.7) with basin-scale winds and with transport through the Tasman Sea estimated from Island Rule, with the changes at the western boundary lagging the wind forcing by three years. We conclude that the trend and decadal variability in the coastal temperature and salinity record reflect the response of the subtropical gyre and western boundary current to basin-scale wind forcing. Citation: Hill, K. L., S. R. Rintoul, R. Coleman, and K. R. Ridgway (2008), Wind forced low frequency variability of the East Australia Current

Item Type: Article
Keywords: East Australia Current, physical oceanography, western boundary currents, decadal ocean variabliity, air/sea interactions
Journal or Publication Title: Geophysical Research Letters
Page Range: pp. 1-5
ISSN: 0094-8276
Identification Number - DOI: 10.1029/2007GL032912
Additional Information: Copyright 2008 American Geophysical Union.
Date Deposited: 06 Mar 2009 03:11
Last Modified: 18 Nov 2014 03:56
URI: http://eprints.utas.edu.au/id/eprint/8441
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